I just realised today the ambiguity in the term 'mother fucker'. Does it mean that that person fucks mothers, or that that person is just a greater, enhanced type of fucker (like in the way one would say, "that's a mother of a mountain/beer/house") ?

Ah, like as in mastery.

It is a luxury to be understood - Ralph Waldo Emerson

Those who can make you believe absurdities, can make you commit atrocities - Voltaire